package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        //2.如果不符合,返回错误信息
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }

        //3.符合,生成验证码
        String code = RandomUtil.randomNumbers(6);
        //4.保存验证码到redis
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //5.发送验证码
        log.debug("发送短信验证码成功:"+code);
        //返回ok
        return Result.ok(code);
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();

        //校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        //2.检验验证码
        String codeKey = LOGIN_CODE_KEY + phone;
        String cacheCode = stringRedisTemplate.opsForValue().get(codeKey);
        stringRedisTemplate.delete(codeKey);
        String code = loginForm.getCode();

        if (cacheCode==null||!cacheCode.equals(code)) {
            //不一致,错误
            return Result.fail("验证码错误");
        }

        //手机号查用户
        User user = this.query().eq("phone", phone).one();

        //
        if (user==null) {
            user = craeteUserWithPhone(phone);
        }
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);

        //存储user
        Map<String, Object> map = BeanUtil.beanToMap(userDTO,new HashMap<>(), CopyOptions.create().setIgnoreNullValue(true).setFieldValueEditor(
                (fieldName,fieldValue)->
                    fieldValue.toString()
        ));
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token,map);
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,LOGIN_USER_TTL,TimeUnit.SECONDS);

        return Result.ok(token);
    }

    private  User craeteUserWithPhone(String phone) {
        //1.创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
        //
        this.save(user);
        return user;
    }
}
